Hinge for trestles and the like



R.G.CHESHmE.

HINGE FOR TRESTLES AND THE LIKE.

APPLICATION fILED JUNE 5.1918.

1,327,808, Patented Jan. 13,

VNVENTORi RJQ:HESHPRE ROBERT G. CHESHIRE, 0F BIRMINGHAM, ENGLAND.

i HINGE FOR TRESTLES AND THE LIKE.

Specification of Letters Patent. Patented J an, 13,1920.

Application'filed June 5, 1918. Serial No. 238,375.

To all whom it may 007106721.

Be it known that 1, ROBERT GEORGE CHESH- IRE, subject of the King ofGreat Britain, residing at 98 Grosvenor street west, Ladywood, in thecity of Birmingham, in the county of Warwick, England, have invented newand useful Improvements in Hingesfor Trestles and the like, of which thefollow-- ing is a specification.

This invention relates to hinges for trestles and the like and has for.its object. to provide means whereby the hinge is stronger and morerigid and. will withstand side strain, the invention being particularlyapplicable to painters trestles.

According to this invention, the hinge members are formed about theirpivot with broad checks or fiaps which considerably overlap and bear oneach other so that should any side strain be caused to the hinge body,it is taken up by the broad cheeks or flaps mutually. This resistance toside strain is enhanced by arranging the arms of the hinge body topartly overlap at their inner edges when the hinge is in the closedposition. The broad cheeks or flaps also overlap to take up side strainboth when the hinge is open or closed, and the arm portions also overlapbut in a reduced degree. In each cheek or flap there is provided a slotin which engages a pin or like projection from the other check or flapto limit the extent of opening or closing of the hinge.

My invention will now be described in conjunction with the accompanyingdrawings, in which Figure 1 illustrates the hinge attached to thetrestle members in the position it occupies when the trestle is closed.

Fig. 2 illustrates the open position of the hinge upon the trestlemembers.

Fig. 3 is a front elevation of the front member of the hinge.

Fig. 4 is a side elevation of Fig. 3.

Fig. 5 is a front elevation of the rear member of the hinge, and

Fig. 6 is a side elevation of Fig. 5.

The hinge comprises a pair of members 7 and 8 of substantially similarshape, (compare Figs. 3 and 5). The front member 7 is pivotallyconnected by means of a bolt or rivet 9 to the rear member 8, eachmember of the hinge being formed with a broad cheek portion 7 and 8respectively which extends downwardly into the elongated arm portion 7and 8 respectively. 1 f

The front member 7 has an arcuate slot 1.0 formed in the check portion 7and also a square slot or bolt hole 11 adjacent to which and projectingfrom the rear face of the cheek is a square pin or the like 12. This pinis adapted to engage in a segmental slot 13 formed in the cheek portion8 of the rear member 8 of the hinge, and the check 8'? has a square slotor bolt hole 14- formed therein adjacent to which is the squareqpin 15projecting from the front face of the cheek 8 and adapted to engage inthe slot 10 in the check 7.

Bolts 16 are employed to secure the members 7 and 8 to the trestlemembers 17 and 18, the upper pair of bolts 16 passing through the slotsin the checks of the members 7 and 8 and forming also limiting stops forthe extended motion of the hinge members by the abutment of the outerends of the segmental slots 10 and 13 and the square pins 12 and 15 oneither side of the said 'bolts 16, as seen in Fig. 2. The square pins 12and 15 are slightly longer than the thickness of the metal of themembers 7 and 8 into the slots 10 and 13 respectively of which theypass, thereby the end of the pin 12 abuts against the wood of thetrestle while the end of the pin 15 makes an abutting contact with theunderside of the head of the bolt 16, and by this means prevents the twomembers 7 and 8 being jammed together against each other and between thebolt heads 16 and the legs 17 and 18 of the trestle. The pins 12 and '15may therefore be said to form distance stops and they also formsecondary or emer ency stops in the event of the breakage of tie bolts16.

The front member 7 of the hinge has a strengthening flange 19' formedthereon all around the edge of the member and the rear member 8 has aflange 20 thereon around the edge of the extended arm portion 8? of themember as seen clearly in Fig. 5. The member 7 is off-set at 21 as seenin the drawings so as to form a flat rear surface in the same plane ofthe two 7 members 7 and 8 so that the two members may be nicely fittedto and secured upon the trestle members 17 and 18. i

A right and left pair of hinges constitute the necessary equipment for atrestle, one hinge (comprising two members 7 and 8) being attached toeach side or the trestle, any lateral strain transmitted to the legs ofthe trestle is by this means taken up by one or other of the hinges.

I claim l. A hinge for trestles and the like comprising two members ofsubstantially the same configuration having overlapping broad cheekportions and partially over-u lapping integral arm portions, a hingepivot connecting said members, an arcuate slot in each of said members,and a pin projecting from each of said members from opposite directionsinto the arcuate slot of the other member.

2. A hinge for trestles and the like comprising two members ofsubstantially the same configuration having overlapping broad cheekportions and partially overlapping integral arm portions, a hinge pivotconnecting said members, an arcuate slot in each of said members, and apin projecting from each of said members from opposed directions intothe arcuate slot of the other member, said pins being of a lengthslightly exceeding that of the thickness of the metal surrounding saidslots.

3. A hinge for trestles and the like comprising two members havingoverlapping broad cheek portions and partially overlapping integral armportions a hinge pivot connecting said members, a segmental slot in eachof said members, a pin projecting from each of saidv members into thesegmental slot of the other member, and a plurality of bolt holes formedin said members one of the said bolt holes being located adj acent toeach of the said pins.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

ROBERT Gr. CHESHIRE.

Witnesses:

GEORGE E. LOLKES, D. M HEATLEY.

